Fluid-brake.



1". BMINGHAUS'.

FLUID BRAKE.

APPLIUATION FILED FEB. I7-, 1906l 964,485. Patented July 19, 1910.

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UNITED STATES iPATENT OFFICE.

FRANZ IB1VlIING1-IAUS, OF ESSEN-ON-THE-RUHR-WEST, GERMANY, ASSIGNOR T0 FRIED. KRUPP AKTIENGESELLSCHAFT, OF ESSEN-ON-T-HE-RUHR, GERMANY.

FLUID-BRAKE.

Specification of Letters Patent.

Patented July 19, 1910.

.many, have invented certain new and useful Improvements in Fluid-Brakes, of which the following is a specication.

The present invention relates to the class 0f fluid-brakes for recoil-guns in which means are provided for regulating the length of recoil.

In the accompanying drawings, one embodiment of the invention is shown by way of example.

Figure 1 shows the brake partly in longitudinal section and partly in side view; Fig. 2 is a section on the line 2 2, Fig. l, seen from above; Fig. 3 is a section on the line 3 3, Fig. 2, seen from the right; Fig. 4 is a view corresponding to Fig. 2 with changed position of some parts; Fig. 5 is `a section on line 5 5, Fig. 2, seen from above, and Figs. 6 and 7 are diagrammatic views.

C is a part of the cradle which remains stationary during the firing. The piston vrod B is rigidly secured to the cover 01 of the cradle through the medium of a flange b1. The brake-cylinder A is guided in the cradle in such a manner that all the pointsV of the cylinder move in a straight line during the recoil. The piston D is rotatably but non-slidably connected to the piston-rod B and the structure of the piston is approximately that of a hollow cylinder. The connection between the piston and the pistonrod consists of a shoulder Z1 on the piston,

1,slide E (Figs. 2 to 5) is arranged, the shapek of which 1s approximately hollow-cylindrical. The outer surface e1 of the slide i lies tightly against the inner wall Z4 of the hollow space of the slide. Two passages Z5V (Figs. 1 to 4) in the piston, merge into the guiding surface Z4 for the slide E. Each of the passages Z5 communicates with the fluid space toward the head F of the brake- -cylinder, through the medium of a groove Z6 cut in the exterior wall of the piston.

The piston-rod B is provided with a central bore b? (Fig. 1) in which is mounted a rod G. One end of the rod G is rigidly connected with the slide E through the medium of a transverse in H (Figs. 2, 4 and 5) for which a pair olfj guide-slots b5 (Figs. 3 and 5) are provided in the piston-rod B. The slots b5 extend parallel to the longitudinal axis of the piston-rod. The end g1 (Fig. 1) of the rod is provided with screwthreads which engage with the screw-threads of a nut J (Fig. 1) which is rotatably but non-slidably arranged in the cover 01. The above-described arrangement prevents rotation of the slide E relatively to the pistonrod B and permits of the slide E being adjusted relatively to the piston. D in the direction of the longitudinal axis of the brake when the nut J is turned.V

When the parts assume the position shown in Figs. 1 to 3, Fig. 5 and position I in Fig. 6, and recoil of the brake-cylinder A takes place, the fluid passes from the piston-rod side of the brake-cylinder to the other side of the piston through the hollow space of the slide E, the passages c3 and Z5 and the grooves d6. During the movement of the brake-cylinder the slide E does not change its position but by reason of the curved course of the guide groove al for the projection (Z2, the piston D turns relatively to the slide E. The passages d5, therefore, become gradually cut olf by the outer surface el of the slide E, that isto say, the area of the passage becomes gradually diminished at the place where the fluid passes from the passages e3 into the passages d5, and the fluid becomes throttled to an increasing extent. Vhen finally the passages (Z5, are entirely covered by the outer surface el of the slide E (see position II, Fig. 6) the passage of the fluid is cut off and the recoiling parts, therefore, come to a standstill. This does not, however, take place until the brake cylinder has made its full stroke owing to the dimension of the passages e3, d5, and the shape of the groove al.

If it is desired to obtain a recoil, the length of which is about half of the normal recoil, the slide E is moved by hand or automatically by means of the nut J, the rod Gr and the pin H, until the passages a3 assume approximately the position shown in position III, Fig. 7, relatively to the passages (Z when the parts are in the position of rest. IVhen the recoil commences the available area for the passage of the fluid is then correspondingly smaller and during the recoil it becomes gradually diminished, and it is entirely cut off', when the passages (Z5 assume the position shown in position IV, Fig. 7, relatively to the passages e3. The passage of the fluid is then cut off and the recoiling parts come to a standstill.

Any other length of recoil which lies between the shortest permissible and the normal may of course be obtained by suitable adjustment of the slide.

Having thus described my invention what I claim as new therein and desire to secure by Letters Patent is 1. In a recoil brake having parts formed with registering openings providing a bypass for the fluid, rotating relatively during recoil to throttle the passage of fluid through said by-pass and adjustable to vary the length of' the recoil; means for changing the relative positions of said parts in a direction at an angle to the direction of relative rotation, whereby the point of fluid cut oft may be changed at will.

2. A recoil gun having parts provided with registering openings, rotating i'elatively during recoil to cut off flow of brake fluid and adjustable transversely to such rotation to regulate the point of cut off one of said openings having a part extending at an angle to the direction of cut off movement whereby the flow is cut off at different points by the previous adjustment of the parts.

3. The combination with a piston rovided with a passage through which uid passes from one side of the piston to the other, of a throttling device for the passage in the piston, adjustable to change the length of the recoil, a hollow piston rod, and a rod axially adjustable within the hollow piston rod and connected with the throttling device to adjust said device to change the recoil.

4L. The combination with a piston provided with a passage through which fluid passes from one side of the piston to the other, of a throttling device for the passage in the piston, adjustable to change the length of the recoil, an axially movable rod connected with the throttling device to adjust said device to change the recoil, and a nut suitably journaled against axial movement relatively to the piston and connected to the rod to cause its axial movement.

5. In a fluid pressure brake, the combination of a piston rod, a piston provided with a passage through which fluid passes from one side of the piston to the other, a throttling device for the passage in the piston, arranged between the iston and the piston lrod, and adjustable axially of the piston to change the length of the recoil, and means for adjusting said throttling device.

6. In a fluid brake for guns, the combination of' a hollow piston provided with a passage through which the fluid passes from one side of the piston to the other, a piston rod, a slide tightly fitting within the piston between the piston and the piston-rod and movable axially therein, said slide being provided with a passage adapted to register with the passage in the piston, and means for adjusting the slide within the piston.

7. In a fluid brake for guns, the combination of a hollow piston provided with a passage through which the fluid passes from one side of the piston to the other, a hollow piston-rod on which the piston is rotatably arranged, a slide tightly fitting within the piston and movable axially therein, said slide being provided with a passage adapted to register with the passage in the piston, and means passing through said piston-rod and engaging said slide for adjusting the slide within the piston.

8. In a fluid pressure brake of the character described, having a slide adjustable axially for varying the throttling effect during recoil; means for imparting axial adjustment to the slide consisting of a rod extending through the piston rod, a pin carried by the end of said rod, working in l slots in the piston rod and entering the slide, and a nut threaded on the other end of said roi in position to be accessible from the outsi e.

9. In a fluid brake for guns, the combination of a piston rod, a piston having a sui'- face parallel to the longitudinal axis of the brake and having openings for the passage of the fluid, a slide movable on said surface of the piston between the piston and the piston rod and having openings adapted to register with the openings in the piston, and means for adjusting the slide relatively to the piston from the outside.

10. In a fluid brake for guns, the combination of an adjustable hollow piston provided with a passage through w iich the fluid passes from one side of the piston to the other, a guide tightly fitting within the pisq. ton, said guide being provided with a pas- Within said piston parallel to the longiseldorf this twenty-ninth day of January, tudinal axis of the brake and having open- 1906. ings adapted to register With the openings FRANZ BMINGHAUS in the piston, and means for effecting a rela- 5 tive axial adjustment between the guide and In presence 0fpiston. WILLIAM ESSERMEIN,

The foregoing specification signed at Ds- PETER RIEBER. 

